Java设计模式之二：策略模式

public class StrategyContext {
    //持有一个具体策略的对象
    private Strategy strategy;
    /**
     * 构造函数，传入一个具体策略对象
     * @param strategy    具体策略对象
     */
    public StrategyContext(Strategy strategy){
        this.strategy = strategy;
    }
    /**
     * 策略方法
     */
    public void contextInterface(){
        strategy.strategyInterface();
    }
}

public interface Strategy {
    /**
     * 策略方法
     */
    public void strategyInterface();
}

public class StrategyA implements Strategy {
    @Override
    public void strategyInterface() {
        //相关的业务
    }
}

public class StrategyB implements Strategy {
    @Override
    public void strategyInterface() {
        //相关的业务
    }
}

public class ContextClient {
  public static void main(String[] args) {
    Strategy  StrategyA = new StrategyA();
    StrategyContext contextA = new StrategyContext(StrategyA );
    //调用策略A的执行方法
    contextA.contextInterface();
  }
}